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Ubuntu Security Notice USN-3551-1
January 30, 2018

webkit2gtk vulnerabilities
==========================================================================

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 17.10
- Ubuntu 16.04 LTS

Summary:

Several security issues were fixed in WebKitGTK+.

Software Description:
- webkit2gtk: Web content engine library for GTK+

Details:

Multiple security issues were discovered in the WebKitGTK+ Web and
JavaScript engines. If a user were tricked in to opening a specially
crafted website, an attacker could potentially exploit these to cause a
denial of service, spoof the user interface, or execute arbitrary code.
(CVE-2018-4088, CVE-2018-4096, CVE-2017-7153, CVE-2017-7160,
CVE-2017-7161, CVE-2017-7165, CVE-2017-13884, CVE-2017-13885)

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 17.10:
  libjavascriptcoregtk-4.0-18     2.18.6-0ubuntu0.17.10.1
  libwebkit2gtk-4.0-37            2.18.6-0ubuntu0.17.10.1

Ubuntu 16.04 LTS:
  libjavascriptcoregtk-4.0-18     2.18.6-0ubuntu0.16.04.1
  libwebkit2gtk-4.0-37            2.18.6-0ubuntu0.16.04.1

This update uses a new upstream release, which includes additional bug
fixes. After a standard system update you need to restart any applications
that use WebKitGTK+, such as Epiphany, to make all the necessary changes.

References:
  https://www.ubuntu.com/usn/usn-3551-1
  CVE-2017-13884, CVE-2017-13885, CVE-2017-7153, CVE-2017-7160,
  CVE-2017-7161, CVE-2017-7165, CVE-2018-4088, CVE-2018-4096

Package Information:
  https://launchpad.net/ubuntu/+source/webkit2gtk/2.18.6-0ubuntu0.17.10.1
  https://launchpad.net/ubuntu/+source/webkit2gtk/2.18.6-0ubuntu0.16.04.1